The Louvre, the world’s most-visited museum and a global symbol of art, beauty and endurance, remained shuttered Monday — not by war, not by terror, but by its own exhausted staff, who say the institution is crumbling from within.

The Louvre, the world's most visited museum, abruptly shut down due to a strike over overcrowding and poor working conditions. Here's why the closure matters for tourists and the future of global heritage travel.

Visitors were left stranded outside in Paris on Monday after a monthly union meeting led to a wildcat strike over workplace conditions and crowding.